Solution
= Solution
<Completing the square> transforms the equation into
$$
(x+1)^2+(y+2)^2=9.
$$
Comparison with the standard <circle> equation gives
$$
\boxed{\text{centre}=(-1,-2),\qquad\text{radius}=3.}
$$
= Solution
<Completing the square> transforms the equation into
$$
(x+1)^2+(y+2)^2=9.
$$
Comparison with the standard <circle> equation gives
$$
\boxed{\text{centre}=(-1,-2),\qquad\text{radius}=3.}
$$